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Tag: "force" at biology news

Molecular Motors Cooperate In Moving Cellular Cargo, Study Shows

...r the speed and direction of a peroxisome, and the force acting upon it. "By measuring force we can determine how many molecular motors are working together," Selvin said. "This will help us fu...

International HapMap consortium expands mapping effort

... a factor of 20 to 40 compared with current, brute force approaches. "This new partnership underscores the private sector's enthusiasm for the HapMap and its potential as a tool for the understanding of disease. The willingness of these firms to contribute to building an even better map follows the collab...

Sexual cooperation: Mating increases longevity in ant queens

...henomenon of sexual conflict is a powerful driving force in the evolution of reproductive biology for many ...rs of colony growth, during which a sterile worker force is built up in the population. The fact that mates bond so early reduces the conflict between mating...

Family trees of ancient bacteria reveal evolutionary moves

...has proposed that evolution is the primary driving force in the early Earth's development rather than physical processes, such as plate tectonics. Carrine Blank, Ph.D., Washington University assistant professor of geomicrobiology in the Department of Earth & Planetary Sciences in Arts & Sciences, ...

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

...using the infinitesimal tip of a customized atomic force microscope (AFM) to capture, isolate and study sin... protein polymers known as amyloid fibrils. Atomic force microscopes use a sharp microscopic tip to image surfaces and detect energy differences by mechanica...

Open microfluidic and nanofluidic systems

...e morphologies as observed by atomic (or scanning) force microscopy (AFM) are shown in Figure 1. When the ...then be scanned directly with the tip of an atomic force microsope. However, the same morphology diagram should also apply to other liquids and other substra...

Needling Chromosomes Reveals Cell Division Secret

...ell division. Then, she would ever-so-gently apply force to pullthem apart. Upon release, if they remained apart it revealed they wereseparated; but if they snapped back together the researchers would knowthe chromatids were still attached. Paliulis was a Duke graduatestudent when she performed the experim...

UAB scientists discover the origin of a mysterious physical force

... been trying to establish the cause of a repulsive force occurring between different electrostatically char...re very close to each other in aqueous media. This force became know as hydration force. Jordi Faraudo, a researcher for the Department of Physics at the Un...

A gene's first 'kiss' sets off that affair known as puberty

...t four to six months of age, then reemerge in full force some 10 to 12 years later? "Puberty is critical to human development. And while there is a fairly good understanding of how the endocrine system regulates the hormones involved, just how and when the brain activates this process has been a great mys...

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